#!/bin/bash
#Program:
#	This program shows "Hello World!" in your screen.
#History:
#20171113	zhouxh	v1
PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:~/bin
export PATH

# if [ "${1}" == "hello" ]; then
#	echo "Hello, how are you?"
# elif [ "${1}" == "" ]; then
#	echo "You MUST input parameters, ex> {${0} someword}"
# else 
#	echo "The only parameter is 'hello', ex> {${0} hello}"
# fi


case ${1} in
	"hello")
	echo "Hello, how are you ?"
	;;
	"")
	echo "You MUST input parameter, ex> {${0} someword}"
	;;
	*)
	echo "Usage ${0} {hello}"
	;;
esac
